New 100-400L IS II?

After reading the rest of posts , 1 other thing I did not mension that may only be important to me is the filter size

With out stirring the pot on filter use , if the new lens [ if there is one ] is other than 77 mm [ the 10-22 , 17-55 , 70-200] I could also live with 72 mm [ my 28-135 and 35-350 ] Other sizes just take up to much room in bag , since I carry at least a spare UV and 2 cpl's [ only one nd 6 - but 2 nd 3's ] - it would be a deal breaker .